Vol. 16, issue 05-06, article # 5
pdf Vinogradova A. A., Shevchenko V. P., Ponomareva T. Ta., Kluvitkin A. A. Fifteen-year trends in processes of air mass and anthropogenic aerosol transport over the Laptev Sea region. // Atmospheric and oceanic optics. 2003. V. 16. No. 05-06. P. 391-395.Copy the reference to clipboard
Abstract:
Fifteen-year (1986-2000) daily 5-day forth and back trajectories of air mass motion for one month (January, April, July, and October) in each season are analyzed for a geographic point located roughly at the center of the Laptev Sea. The seasonal behavior of mean atmospheric concentrations and surface deposition of six anthropogenic chemical elements (As, Ni, Pb, V, Zn, Cd) is calculated. The 15-year variations of the studied characteristics are estimated as linear trends of 8-year sliding averages. It is shown that for 15 years the role of European regions in pollution of the Laptev Sea has decreased, while the role of Asian regions has, to the contrary, increased. As a result of variation of only atmospheric circulation processes, the summer and spring pollution levels almost did not change, while the trends of winter and fall levels were almost identical, but with the opposite signs (increase in winter and decrease in fall). The annual mean fallouts of the considered aerosol microelements on the surface of the Laptev Sea decreased by no more than 20%. The actual decrease of atmospheric emissions of anthropogenic pollutants that occurred in Eurasia in these years should further enhance this effect.